The new “Connections Build Us” campaign from American Greetings and MullenLowe involves a workout that plumbs depths both physical and emotional. Directed by Variable’s Kevan Funk and edited by Sloane Klevin of bicoastal Union (with :30 and :15s cut by Christopher Huth), the campaign’s centerpiece film “A True Test of Strength” shifts gears dramatically, from the intensity of the gym to one-on-one meetings with Harvard psychiatrist and wellness researcher Dr. Robert Waldinger. There, each athlete is encouraged to send a card to someone who holds a special place in his or her life.

Exercise is one way to boost your health — but not the only way. Research shows that close relationships also help us live longer, healthier lives. With this film, American Greetings demonstrates how strong athletes become even stronger when they connect to those who matter. Fitness influencers Bethany Hamilton, Nastia Liukin, Natalie Jill, Olivia Jordan, Alana Blanchard and the NBA’s Kevin Love are on board to spread the word. #ConnectionsBuildUs #GiveMeaning